General Information:
Chemical Formula:
NaCs(Be,Li)Zr2(PO4)4·1-2(H2O)
Composition:
(Molecular Weight = 753.75 gm)
Cesium 17.63 % Cs
Sodium 3.05 % Na
Lithium 0.23 % Li
Zirconium 24.21 % Zr
Beryllium 0.90 % Be
Phosphorus 16.44 % P
Hydrogen 0.40 % H
Oxygen 37.15 % O
Empirical Formula:
NaCsBe0.75Li0.25Zr2(PO4)4·1.5(H2O)
Environment:
It occurs in open cavities up to several centimeters across and formed as a result of late-stage hydrothermal alteration of earlier formed Zr-bearing minerals.
IMA Status:
Approved IMA
Locality:
Mount Mica granite pegmatite, South Paris, Oxford County, Maine, USA.
Name Origin:
In honor of the late Dean McCrillis and his son, Philip.
Physical Properties:
Cleavage:
None
Color:
colorless or white.
Density:
3.12
Diaphaniety:
Transparent to translucent
Habits:
Crystalline - Fine - Occurs as well-formed fine sized crystals., ,
Hardness:
4.5 - Between Fluorite and Apatite
Luminescence:
Non-fluorescent.
Luster:
Vitreous (Glassy)
Streak:
white
More details...